|Club|League|Sport|Venue|Established|Championships|
|---|---|---|---|---|---|
|Madison Mustangs|IFL|American football|Breitenbach Stadium|1997|4 consecutive Ironbowls|
|Madison Mallards|NL|Baseball|Warner Park|2001|1 championship|
|Madison 56ers|NPSL|Soccer|Breese Stevens Field|2005|0 championships|
|Wisconsin Rugby Club|WRFU|Rugby|Wisconsin Rugby Club Sports Complex|1962|2 championships|
|Madison Minotaurs|WRFU|Rugby|Yahara Rugby Field|2007|0 Bingham Cups|
|Wisconsin Badgers|Big Ten, NCAA Div.1|23 Varsity Teams|Camp Randall Stadium, Kohl Center|1849|27 championships|
|Edgewood Eagles|NACC, NCAA Div.3|16 varsity teams|Edgedome|1974|35 championships|
|Madison College Wolfpack|N4C, NJCAA Div.3|8 varsity teams|Redsten Gymnasium, Roberts Field|1912|21 championships|
|Mad Rollin' Dolls|WFTDA|Roller derby|Alliant Energy Center|2005|0 championships|
|Madison Blues|GLHL|Hockey|Capitol Ice Arena|2010|0 championships|

Question: how many current teams have been in existence for 25 years or greater?
Answer: 4